20988515

素因数分解:

$5^1\times {\mathrm{41}}^1\times {\mathrm{43}}^1\times {\mathrm{2381}}^1$

素因数の和:2470

約数の個数: 16

約数和(自身を含む): 26411616

約数和(自身を除く): 5423101

約数列:

[1, 5, 41, 43, 205, 215, 1763, 2381, 8815, 11905, 97621, 102383, 488105, 511915, 4197703, 20988515]

約数ペア:

[(1, 20988515), (5, 4197703), (41, 511915), (43, 488105), (205, 102383), (215, 97621), (1763, 11905), (2381, 8815)]